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Publikováno v:
Physica Status Solidi (a). 140:213-219
Five superconductors of the Nd1 + xBa2−xCu3O6.5 ± y type (x = 0.00, 0.05, 0.10, 0.15, and 0.20) are prepared. The orthorhombic crystal lattice observed at x = 0 gradually transforms into a tetragonal structure at increasing values of x. Resistivit